Patent GB-400947-A (GB)
Title: Improvements in actuating devices for the multiplier register of a calculating machine
IPC: G06C15/38
Filed: 1932-05-02
Abstract: 400,947. Calculating- apparatus. OHMOTO, T., 14, Yebiye Kami Shichome Nishiyodogawaku, Osaka, Japan. May 2, 1932, No. 12596. [Class 106 (i).] Multiplying-apparatus.-In a machine for the four rules with a laterally movable totalizing- counter carriage a form of transfer mechanism for the multiplier or quotient register is provided comprising an assembly of three sets of transfer actuating wheels operable in either direction of rotation. The wheels are formed with laterally movable transfer teeth and with cams ; the wheels of the lower denominations are fixed relatively to one another and to their cams, the wheels of the intermediate denominations are fixed relatively to one another and to the former wheels while their cams are relatively movable to a limited extent in either direction, and the wheels of the higher denominations are movable relatively to one another and to the wheels of the other denominations while their cams are also movable relatively to their wheels. In operation the transfer teeth arrange themselves in a spiral formation in one or other direction and are displaced into operative position by the setting of corresponding cam projections on transfer arms co-operating with the cam discs on the numeral wheels. The use of transfer wheels of small size embodying the above described construction renders the production of compact machines possible. The machine as shown in Fig. 1 comprises the usual cam disc and pin wheel differential actuator 65 driven by gearing from the handle 1. Slidably mounted on the shaft of the actuator is a collar 10, Figs. 2 and 3, with a pinion 6 movable to one or other of two positions by means of a lever 11 to engage pinions 8 or 13 forming part of a reversing mechanism driving toothed wheels 15, 16, whereby the latter may be rotated in one direction irrespective of the .direction of movement of the main handle. The wheel 15 drives the transfer wheels while the wheel 16 actuates the revolutions counting mechanism step-by-step. The wheel 16 is provided on one side with a stud 17, Figs. 4 and 5, and a pin 18 engaging a recess 19 in a tooth housing 20 provided with a pair of teeth 23 pressed by means of a spring 24 into contact with the stud 17. The housing is held in normal position by a locking pawl 26 engaging a recess 27 in the housing. During an operation the housing is held until the pin 18 engages one or other end of the recess 19 whereupon the stud 17 engages the projection 22 on one or other of the teeth 23 so as to project it into operative position to drive a toothed wheel 28 step-by-step, the wheel 28 being geared to the units drum 30 of the revolution counter. Transfer mechanism.-Each numeral drum 30 carries a cam 43 co-operating with a transfer arm 39, Fig. 9, with a slot 40 surrounding the shaft of the wheels 28 and a lateral projection 41. When a transfer is to be effected the arm 39 is lowered to set the corresponding projection 41 into the path of movement of laterally displaceable transfer teeth 31 pivotally mounted on actuating wheels 33, Figs. 10 and 12, operated by the driving wheel 15 ; when a transfer tooth is displaced the wheel 28 of next higher denomination is advanced one unit. The actuating wheels 33 are subdivided into three sets for the lower, intermediate, and higher denominations. The lower set comprises three wheels each with a pair of transfer teeth 31 and a cam disc 48 on one side of a gear wheel 56, the angle between the transfer teeth and the extent of the cam surface decreasing from the units denomination upwards. Fig. 13 shows the wheel of the units denomination. The intermediate set comprises two wheels the first of which has a pair of transfer teeth 31, and a pair of pins 60, Figs. 16 and 18, extending into arcuate recesses in a cam disc 48 that is mounted for relative rotation to a limited extent in either direction. The second intermediate wheel is similar except that only one transfer tooth and one pin 60 is provided. The wheels of the higher denominations are formed as drums 33 with single transfer teeth 31 and pairs of pins 60 extending into grooves 62 on the opposite side of the next higher drum, and the cam discs 48 are formed with arcuate slots 59. To the extreme right hand gear wheel 56 is secured a pair of rods 57 which pass through holes 58 in the lower and intermediate sets of wheels and extends into the grooves of the first of the higher set of wheels. The gear wheels 56 are provided for the purpose of ensuring rotation of the actuating wheels 33 in any position of the totalizer carriage. By this arrangement of pins and slots the transfer teeth assume a spiral formation in one or other direction of rotation.